GASPARD Collaboration: recent activities at BARC, …pell/talkpdf_webpage/kmahata_pic13.pdf ·...
Transcript of GASPARD Collaboration: recent activities at BARC, …pell/talkpdf_webpage/kmahata_pic13.pdf ·...
GASPARD Collaboration: recent activities at BARC, Mumbai
K. Mahata, A. Shrivastava, J. Gore, S. K. Pandit, V. V. Parkar, P. Patle
Nuclear Physics Division Bhabha Atomic Research Centre, Mumbai
Plan of the talk
Introduction
BARC participation
R&D with si strip detectors
Test experiment at PLF, Mumbai
Summary & Outlook
: A 4 particle array fully integrable in major gamma arrays (PARIS, AGATA, EXOGAM2)
Optimized for PA –GA coincidences
E* resolution gain>10 w/r particles only High efficiency for w/r MUST2/TIARA/EXOGAM Gamma spectroscopy of populated states …
AIM : Optimal study of reactions with beams from SPIRAL2 , FAIR(LowE), HIE-Isolde, SPES…
From SISSI/SPIRAL to
Light ions (A≤40) Heavier ions (Fission fragments)
Other features of
Excellent PID for light particles PSA technique for particle ID Integration of special targets
Pure and windowless H or D Cooled 4He or 3He gas Triton targets for e.g. (t,p) 0+
2 states, pairing, etc… Any solid target e.g. 6Li, 7Li for p, a, … transfer Polarized targets (require high intensities)
Capability to handle high intensity beams Large dynamical range Easy coupling with spectrometers
SHELL EVOLUTION How Magic is 78Ni ? W.Catford, O.Sorlin Spectroscopic studies around 78Ni and beyond N=50 via transfer and coulex G.De France, A.Gadea, X.Valiente, R.Orlandi Neutron shell evolution in weakly bound 134,135Sn via (d,p) reactions V.Lapoux, O.Sorlin
PAIRING Probing the pairing interaction through two-neutron transfer reactions D.Beaumel Study of pair transfer in 134Sn via 132Sn(t,p) O.Sorlin, K.Wimmer 2p capture on 15O and proton correlation in 2p emission from excited states of 17Ne M.Assié, F. De Oliveira
CLUSTERS Exploration of cluster breakup in light nuclei J.A.Scarpaci, M.Assié
+ NEAR BARRIER REACTIONS, PDR, ASTROPHYSICS,…
13 LoI’s related to
How Magic is 78Ni ? CatfordSorlin
N=48,50 Zn,Ge(d,p)(d,t)
Spectroscopic studies around 78Ni and beyond N=50 via transfer & coulex
De France, Gadea, Valiente- Dobon, Orlandi
73,75,77Cu,81Ga,79Zn,74,76,78,80Zn,86,88Se,84Ge (d,p),(t,), Coulex
Tit2 targetEXOGAM/AGATADIAMAN/SPIDER
Neutron shell evolution in weakly bound 134,135Sn via (d,p) reactions
Lapoux, Sorlin 132-134Sn(d,p) CD2, ACTARCHyMENE
Probing the pairing interactionthrough two-neutron transfer
Beaumel 132Sn (p,t) 13 MeV/u CHyMENE
Study of pair transfer in 134Sn via 132Sn(t,p)
Sorlin, Wimmer 132Sn(t,p) Tit2 target
2p capture on 15O and proton correlation in 2p emission from excited 17Ne
Assié, de Oliveira
15O(3He,n) 10 MeV/uNEDA 2 GASPARD
Transfer to bound and unbound states and its influence on reaction dynamic
Shrivastava, Chatterjee
14OElastic, Transfer, Breakup, Fusion
EXOGAM/AGATAPb targetNo spectrometer
Exploration of cluster breakup in light nuclei
Scarpaci, Assié 14,15,16O, 20 MeV/uBreakup
PARIS
Gamma transition probability in unbound nuclei
Stefan, de Oliveira
14O(p,) 5.3, 5.6 MeV/u PARIS ?
Microscopic structure of Pydmy Dipole Resonance
Beaumel, Maj 131Sn(d,p)(d,t) 10 MeV/u
PARIS
GAmma SPectroscopy and PArticle Detectiondesign
Layers of Silicon : 300(500) m DSSD pitch < 1mm (to be developed by BARC) 2x [1.5 mm DSSD pitch~3mm] (FWD) 1x [1.5 mm DSSD pitch~3mm] (BWD)
Integration of special targets (cryogenic,…)
ELECTRONICS:~ 15000 channels (Digital)Preamps to be in vacuum
Option: Annular detectors
Trapezoidal shapes for endcaps
Beam
“GASPHYDE” design adopted as the working solution
BARC, Mumbai joined the GASPARD collaboration French-Indian LIA Meeting, Oct 2010 A. Shrivastava is a member of the GASPARD Management board. Prototype DSSDs to be built by BHARAT Electronics
BEL supplied ~ 2000 Si detectors to LHC/CERN 32 channel pre-shower detectors Other production: Microstrip detectors (470 m pitch)
• Various PIN diodes • Si-PIN diodes
Workplan: Develop standard DSSD (delivery : end of 2011)
Process final-geometry GASPARD detectors of mid-thickness (300 m) with nTD wafers (BEL/ MICRON) Tests to be done at the BARC-TIFR heavy-ion facility
Si detectors developments at BARC Mumbai
Working group meeting on
Attendees :A.Shrivastava, A. Topkar, K. Mahata, V. Jha, K. Ramachandran, P. Patle, S. Pandit, BARC Mumbai(C. Bhattacharya, VECC Kolkata)D. Beaumel, IPN Orsay
Purpose :Establish PID capabilities using PSA with small-pitch Silicon DSSD
Schematic Workplan:(On line with previously agreed WP)
Orsay/Huelva : Develop nTD DSSD (MICRON SC & Barcelona) Test under beam with digital bench BARC: Develop standard & nTD DSSD with BEL, non- rectangular from MIcron Test under beam with digital bench
at BARC, Nov 21st, 2011
PULSE SHAPE ANALYSIS
1) The use of strips 2) Energy limits 3) Homogeneity of the silicon wafers4) Channeling effects5) Charge/current input 6) Sampling rate/resolution7) Detector thickness dependence8) PSA and radiation damage…
Within the program is lead by the Huelva group
IPNO in charge of simulations of detector’s response
Collaboration with the FAZIA group
R&D for the Si array
nTD monocell detectors from CANBERRA (FAZIA) 2x2 cm2, thickness: 500 m• reverse and normal mouting• 6mm collimator Preamps : PACI with boosted Q gain ~ 32 mV / MeVDigitizers: TNT-2 cards - 100 MHz
Preliminary spectra
Imax : maximum of the current signal
E (
MeV
)E
(M
eV)
Imax (a.u.)
Imax (a.u.)
Imax (a.u.)
Imax (a.u.)J.Duenas, V. Parkar, Huelva U.
7Li (35MeV) + 12C reaction @IPN-ORSAY, France
Low statistics (4 hrs beamtime) –will be repeated soon
For low energies, E vs. Imax show better identification of Z and A than E vs. Risetime
Experimental Setup for digital pulse shape analysis
nTD
E-E
Beam Time: October 14-15, 2012Beam: 7Li, 20, 30, 35 MeVTarget: 89Y, 197Au, 12CSignal processing: Digital as well as analog
500
500
E: 30 E: 300
nTD Si pad 2cm x 2cmprovided by OrsayRear side injectionCollimator: 6 mm
Analog Processing
1. MSI-8: Mesytec preamplifier, shaper, timing filter, sum timing
2. PACI with Ortec amplifier
13 bit ADC
Digital Processing
PACI (Orsay) charge out put was digitized using indigenously developedFPGA based High speed Data acquisition board
Card Details
Form factor: 6U.
FPGA:VIRTEX-5 XC5VFX100T
cPCI interface: 32 bit, 33MHz master interface with DMA transfer capability using PCI 9054 from PLX Technology.
Clock: 156.25 MHz clock oscillator for SFP; 40 MHz clock oscillator for PCI; 32 MHz system clock; Clock distribution for ADC and DAC; can accept external clock also.
Rocket IO interface: Two SFP connectors are provided for SFP module.
Memory: 2GB DDR2 – SDRAM; 256Mb flash Memory
Analog Input: Two channels using 12 bit, 1.0 GSPS ADC: ADC12D1000 from National Semiconductor
Configuration: JTAG Mode; Using On-board Configuration PROM.
Typical pulses
7Li + 89Y
500 ns pre-trigger (adjustable)
2.5 s recording interval (adjustable)
7Li + 197Au
Time (ns)
Time (ns)
Summary and outlook
A test experiment to study digital pulse shape analysis has been carried out Only charge signal have been digitized using indigenously developed high speed FPGA based card
Effect of depletion voltage has been studied
Charge as well as mass separation have been achieved
BARC in collaboration with BEL is developing 300m DSSD1st prototype 64x 64 strip DSSD has been received
Test DSSD with source and beam
Thank you
M.Assié, D. Beaumel, N. De Séréville, S.Franchoo, F.Hammache, J.A. Scarpaci, I.Stefan (IPN Orsay, France)
W.N. Catford (Univ. of Surrey, UK)
M. Labiche (STFC Daresbury, UK)
A.Chatterjee, K. Mahata, A. Shrivastava, (BARC Mumbai, India)
L. Acosta, R.Berjillos, J.Duenas, I.Martel, V. Parkar, A.Sanchez-Benitez(Univ. of Huelva, Spain)
A.Corsi, F.Druillole, A.Gillibert, L.Nalpas, E. Pollacco (SphN/IRFU, Saclay, France)
A. Chbihi, F. De Oliveira, O.Sorlin (GANIL, France)
GAmma SPectroscopy and PArticle DetectionCollaboration
J.Duenas, V.Parkar, R. Berjillos, Univ of Huelva M.Assie, D.Beaumel, B.Genolini, T.Faul, V. Le Ven, IPNOD. Mengoni, INFN PadovaGASPARD-HYDE-TRACE
May 2011
DETECTORS1) 70 m SSD, 5x5 cm22) 500 m nTD, 2x2 cm2 (one reverse mounted) from FAZIA (canberra)3) 300 m PAD detectors TRACE prototype (FBK Trento)
MEASURED:• Elastic scattering on Au H @ 1.5, 2, 4, 10 MeV D @ 1.5, 2, 2.5, 10 MeV 7Li @ 12, 18, 34 MeV• Reaction : 7Li + 12C at 34 MeV
(9 UT of beam in total)
beam
Preamplifiers:PACI (IPNO) BW ~ 400 MHzPARC-05 (IPNO) BW ~ 600 MHz
PSA test experiment at Orsay tandem
Next step: test with new detectors from MICRON SC
Delivered Oct 2011 Made of nTD wafers from TOPSIL Small pitch (500 m) High density connectors Special packaging with narrow frames
3-stages telescopes being prepared :
PACI preamplifiers (IPNO) GANIL DAQ with ~ 20 digital channels (MATACQ boards) Monoenergetic beams + reaction
Forthcoming test experiment at IPNO tandem (Feb 2012)
Worplan for 2012
Test experiment at IPNO tandem (February) 3 telescopes with new nTD protos 1 telescope monocell (Fazia) 1 telescope of TRACE (pads) Data analysis – conclusion
start detailed design of final detectors
Develop numerical bench get preamplifiers (PACI) test cards choose/purchase digitizer MATACQ (CAEN) integrate in DAQ
Delivery of standard DSSDs from BEL (June)
Test with -source and beam BEL standard DSSD MICRON sc nTD detectors
ORSAY/HUELVA MUMBAI
PSA test experiment at GANIL with DSSD(FAZIA & GASPARD/HYDE collab.)
Rise time vs Energy
From A. Chbihi
500 m nTD, 5x5 cm2, 16X+16Y (3mm pitch) 3+4 unmasked (MICRON SC, Topsil wafers) rear mounted Placed between 300 m Fazia as E and CsI as ER
PACI Preamps, 3.6mV/MeV & 3000V/A 125 Msamples/s, 12 bits
PSA with DSSD works PSA on one-side only: OK
nTD monocell detectors from CANBERRA (FAZIA)• 2x2 cm2, thickness: 500 m• reverse and normal mouting• 6mm collimator Preamps : PACI with boosted Q gain ~ 32 mV / MeVDigitizers: TNT-2 cards - 100 MHz
Preliminary spectra
Imax : maximum of the current signal
J.Duenas, V. Parkar, Huelva U.